Does this sound fair?

I just finished the 4th cleanup of the year, out of 12 I have to do. I had given the client estimates before I did the job. I did a spring cleanup, fert. app. (don't tell me it's illegal, I already know ), and heavily limed the whole yard. The lawn is about 25,000-27,000 sq. ft. I charged $385 for the whole thing, came in $85 more than the estimate (needed more lime than anticipated), seemed like a lot. What would you have charged? Did I charge a fair price?